body, res := makeLogoutRequest(t, browser, "GET", url.Values{
            "post_logout_redirect_uri": {customPostLogoutURL},
            "id_token_hint": {testhelpers.NewIDTokenWithClaims(t, reg, jwtgo.MapClaims{
                "iss": reg.Config().IssuerURL(ctx).String(),
                "aud": c.GetID(),